"Totez mah goatz" is a commonly used phrase among the teens of Amurica. It means that you are in agreement with what the other person said. Trust me, you should say it any time you get the chance, it's definitely A THING.
Ellie: Do like Kirsten?
Mariah: Totez mah goatz! She is the coolest thing since sliced bread!
Cynthia: I agree.